Article 4
1. The vessels referred to in point 2 (a), (b) and (d) of Annex I, which are named on a periodic list approved by the Commission, may fish only if they keep on board a licence issued by the Commission at the request of the authorities of the Member States. In the case of vessels referred to in point 2 (a) and (b) of Annex I, applications for licences shall be submitted at the time of communication of the proposals for the periodic lists referred to in Article 3 (1). In the case of vessels referred to in point 2 (d) of Annex I, applications for licences shall be submitted at the moment of forwarding the lists of vessels referred to in Article 2. 2. In the case of the vessels referred to in point 2 (a) and (b) of Annex I, each licence shall be issued for not more than three vessels; a description of each such vessel shall be given on the licence. 3. In the case of the vessels referred to in point 2 (d) of Annex I, licences shall be issued for the entire period of fishing authorization, without naming the vessels and subject to the maximum number referred to in Article 3 (4); any vessel engaged in fishing must be in possession of such a licence. 4. Licences shall be issued for a period of at least two calendar months.